工业钛液直接水解制备球形二氧化钛

Synthesis of spherical titania by hydrolysis using industrial titanium sulfate solution

以工业钛液为原料,聚乙烯吡咯烷酮为表面活性剂,在正丙醇和去离子水的混合溶剂中水解制备得到了粒径分布窄、分散性好的球形二氧化钛。通过对表面活性剂浓度、溶液pH值和水解时间等影响因素的研究,得到了高品质球形二氧化钛制备的最佳条件。实验结果主要以扫描电镜和X-ray衍射分析直观的表现出来。结果表明在正丙醇和去离子水体积比为1∶1的混合溶剂中,适量的表面活性剂、较高的pH值及一定的水解老化时间是制备球形颗粒的必要条件。

Spherical titania is successfully prepared from industrial titanium sulfate solution by hydrolysis method. Effects of the PVP concentration,pH values and hydrolysis time on morphology of Titania are studied. The results show that the optimum PVP concentration,relatively high line pH and certain hydrolysis time are necessary to prepare spherical titania in the mixed solvent of 1-propanol and de-ionized water.